CBCP Blockchain Scalability and Interoperability

Question 1

What three properties make up the blockchain trilemma?

Accepted Answer

Decentralization, security, and scalability

Answer

The trilemma says it is hard for a blockchain to maximize decentralization, security, and scalability at once. Improving one often costs another.

Question 2

What does a Layer 2 scaling solution do?

Accepted Answer

Processes transactions off the main chain and settles results back to it

Answer

Layer 2 systems, such as rollups and state channels, handle transactions off-chain or in a separate execution layer. They periodically post proofs or data to the Layer 1 chain, which inherits its security.

Question 3

Which technique splits the network or database into smaller partitions that process transactions in parallel?

Accepted Answer

Sharding

Answer

Sharding divides the state and transaction processing among subsets of nodes, increasing total throughput.

Question 4

What is the Lightning Network?

Accepted Answer

A Layer 2 payment channel network for Bitcoin

Answer

Lightning uses bidirectional payment channels so that many transactions happen off-chain. Only channel opening and closing are settled on the Bitcoin blockchain.

Question 5

What is the main role of a cross-chain bridge?

Accepted Answer

To transfer assets or data between different blockchains

Answer

Bridges lock or burn assets on one chain and mint or release equivalents on another. They enable interoperability but have been frequent targets of attacks.

CBCP - Certified Blockchain Professional Practice Test

CBCP - Certified Blockchain Professional Practice Test

CBCP Blockchain Scalability and Interoperability